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Redalyc.A New Species of Smicridea from Argentina (Trichoptera Revista de la Sociedad Entomológica Argentina ISSN: 0373-5680 [email protected] Sociedad Entomológica Argentina Argentina SGANGA, Julieta V. A new species of Smicridea from Argentina (Trichoptera: Hydropsychidae) Revista de la Sociedad Entomológica Argentina, vol. 64, núm. 3, -, 2005, pp. 141-145 Sociedad Entomológica Argentina Buenos Aires, Argentina Available in: http://www.redalyc.org/articulo.oa?id=322028523014 How to cite Complete issue Scientific Information System More information about this article Network of Scientific Journals from Latin America, the Caribbean, Spain and Portugal Journal's homepage in redalyc.org Non-profit academic project, developed under the open access initiative ISSN 0373-5680SGANGA, Rev. Soc.J. V. Entomol.A new species Argent. of 64(3):Smicridea 141-145, 2005 141 A new species of Smicridea from Argentina (Trichoptera: Hydropsychidae) SGANGA, Julieta V. Laboratorio de Entomología, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires. C1428EHA, Buenos Aires, Argentina; e-mail: [email protected] Una especie nueva de Smicridea de la Argentina (Trichoptera: Hydropsychidae) RESUMEN. Se describen el macho y la hembra de una especie nueva de Smicridea (Rhyacophylax) Müller (Hydropsychidae: Smicrideinae), recolectados cerca del Parque Nacional El Palmar, provincia de Entre Ríos, Argentina. Los machos se caracterizan por la presencia de tres puntas en el ápice del falo, una dorsal y dos laterales, y dos ganchos internos. La hembras se distinguen fácil- mente por las características de la vagina y de la placa interna. PALABRAS CLAVE. Hydropsychidae. Smicridea. Especie nueva. Neotropical. ABSTRACT. The male and the female of a new species of Smicridea (Rhyacophylax) Müller (Hydropsychidae: Smicrideinae) collected near by El Pal- mar National Park, Entre Ríos Province, Argentina, are described. The males of this species are characterized by the presence of three points at the apex of the phallus, one dorsal and two lateral, and two lateral internal hooks. The females are easily distinguished by the characteristics of the vagina and the internal plate. KEY WORDS. Hydropsychidae. Smicridea. New species. Neotropical. INTRODUCTION the genus recorded from this country. Twenty three of these 33 species, belong to the subgenus S. Smicridea McLachlan is the only genus of (Rhyacophylax), and 10 to the subgenus S. Smicrideinae present in the Neotropical region (Smicridea). The species of both subgenera extend (Schefter, 1996), where it is both abundant and their distribution from the Jujuy Province (in the diverse. north of Argentina) to the Chubut Province (in The species of this genus are grouped in two Patagonia) (Table 1). subgenera, Smicridea (Smicridea) McLachlan and Smicridea (Rhyacophylax) Müller, which are found The knowledge of the females of Smicridea is from southwestern United States, through Central poor. Only the females of 52 of the 171 Neotropical and South America and the Antillean islands (Flint species of the genus have been described (Flint, et al., 1999). 1964, 1968a y b, 1974, 1981, 1989; Kumanski, 1987; Botosaneanu, 1990, 1994; Blahnik, 1995; The adults of both subgenera may be Holzenthal & Blahnik, 1995), about a third of the distinguished by their wing venation, tibial formu- total. From Argentina, the females of Smicridea la (Flint, 1974), and the presence of two pairs of (Smicridea) annulicornis (Blanchard), Smicridea pheromonal glands in the abdominal segments VI (Smicridea) anticura Flint, Smicridea (Smicridea) and VII of Smicridea (Smicridea), that are absent in decora (Navás), Smicridea (Smicridea) frequens the abdomen of Smicridea (Rhyacophylax) (Flint (Navás), Smicridea (Smicridea) mucronata Flint, & Denning, 1989). Smicridea (Rhyacophylax) murina McLachlan, and Smicridea (Smicridea) pucara Flint have been In Argentina, the knowledge of the diversity of described. Smicridea is due almost exclusively, to the work of Flint (1972, 1973, 1978, 1980, 1982, 1983, 1989), who has described 25 of the 33 species of 142 Rev. Soc. Entomol. Argent. 64 (3), 2005 Table 1. Distribution of the species of Smicridea recorded from Argentina. Species Distribution S. (S.) annulicornis Argentina (Chubut, Neuquén and Río Negro Provinces); Chile. S. (S.) anticura Argentina (Río Negro Province); Chile. S. (R.) appendiculata Argentina (Misiones and Santa Fe Provinces); Brasil. S. (R.) argentina Argentina (Chaco, Entre Ríos, Formosa and Santa Fé Provinces); Paraguay; Peru. S. (S.) aterrima Argentina (Misiones Province). S. (R.) atrobasis Argentina (Entre Ríos and Misiones Provinces); Brasil; Uruguay. S. (R.) chicoana Argentina (Salta and Jujuy Provinces). S. (R.) coronata Argentina (Córdoba, Corrientes, Entre Ríos and Misiones Provinces); Brasil; Paraguay. S. (S.) decora Argentina (Chubut, Neuquén and Río Negro Provinces); Chile. S. (R.) dentifera Argentina (Entre Ríos and Misiones Provinces); Uruguay. S. (R.) discalis Argentina (Misiones Province). S. (R.) forcipata Argentina (Misiones Province). S. (S.) frequens Argentina (Chubut, Neuquén and Río Negro Provinces); Chile. S. (R.) iguazu Argentina (Misiones Province); Brasil. S. (R.) mesembrina Argentina (Buenos Aires, Catamarca, Córdoba, Entre Ríos, Salta and Tucumán Provinces); Bolivia. S. (R.) minuscula Argentina (Misiones Province); Paraguay. S. (S.) mucronata Argentina (Neuquén Province); Chile. S. (R.) murina Argentina (Mendoza, Neuquén, Río Negro and Salta Provinces); Bolivia; Chile; Colombia; Costa Rica; Ecuador; Nicaragua; Panama; Peru; Venezuela. S. (R.) nanda Argentina (Misiones Province). S. (S.) nigerrima Argentina (Catamarca, Salta and Tucumán Provinces). S. (S.) olivacea Argentina (Catamarca and Salta Provinces). S. (R.) pallidivittata Argentina (Misiones Province). S. (R.) pampeana Argentina (Buenos Aires Province). S. (S.) paranensis Argentina (Misiones Province); Paraguay. S. (R.) peruana Argentina (Northwest); Peru. S. (R.) piraya Argentina (Misiones Province); Brasil. S. (S.) pucara Argentina (Neuquén Province); Chile. S. (R.) spinulosa Argentina (Corrientes, Entre Ríos and Misiones Provinces). S. (R.) unguiculata Argentina (Misiones Province); Brasil; Paraguay. S. (R.) vermiculata Argentina (Misiones Province); Brasil; Paraguay. S. (R.) vilela Argentina (Corrientes and Entre Ríos Provinces); Brasil. S. (R.) voluta Argentina (Entre Ríos Province); Brasil; Peru. S. (R.) weidneri Argentina (Misiones Province); Brasil. MATERIAL AND METHODS dyed with acid fuchsine when necessary, and mounted in glycerin or Fauré media for The males and females of the new species were microscopical observations. collected with a net in the marginal vegetation of El Palmar Stream, near El Palmar National Park, Entre The types of the new species are deposited at Rios Province, Argentina, and preserved in alcohol. the Museo Argentino de Ciencias Naturales, Bue- nos Aires. The disected parts of the specimens were cleared in NaOH 10%, neutralized with phenol, SGANGA, J. V. A new species of Smicridea 143 RESULTS Smicridea (Rhyacophylax) palmar sp.nov. Female (Figs. 4-7) (Figs. 1-7) Length of forewing. 5.2 mm. Etymology. Named for the place where the Eighth sternum formed by two trapezoidal specimens were collected. sclerites, with the posterior margin straight, the medial-posterior angle rounded, and the lateral- Type Material. Male holotype and 8 paratypes (6 posterior one enlarged; with short setae covering males and 2 females): Argentina, Entre Ríos, arro- the surface of the sternum, and longer setae along yo El Palmar, Ruta Nacional 14, Angrisano col., the posterior margin (Fig. 4). Ninth tergite, in dor- XI-2003. sal view, with the apex almost straight, and bearing long setae along the lateral margins (Fig. 5). Internal Diagnosis. This species is readly identified by the plate, in dorsal-posterior view, U-shaped with the structure of the male genitalia. The distal part of lateral arms arched towards the centre, and the the phallus that bears three retrorse points at the anterior bridge straight, produced laterally (Fig. 6). apex, one dorsal and two lateral, and two lateral Vagina complex, as in figure 7. internal hooks, is diagnostic. Immature stages. Unknown. Description Male (Figs. 1-3) Systematic considerations. On the basis of the Length of forewing. 4.2 to 5.0 mm. structure of the male genitalia, and especially for the presence of three points at the tip of the phallus, Coloration of the body dark grayish brown. The Smicridea (Rhyacophylax) palmar sp.nov. seems to specimens preserved in alcohol acquire a dark be related to Smicridea (Rhyacophylax) argentina reddish brown coloration, which contrasts with that (Navás, 1920). They are easily distinguished by the of the setal warts and the abdominal sterna that position of the points, which are dorsal in S. (R.) become whitish. Forewing dark brown, with a argentina, and one dorsal and two lateral in transverse, subapical, irregular, white band, and two Smicridea (Rhyacophylax) palmar sp. nov., and by pale maculae, a round one between R4 and R5, and the presence of two lateral internal hooks in a subrectangular one anterior to R2+3 and the Smicridea. (Rhyacophylax) palmar sp. nov. which proximal part of R2, covering a zone of Sc and R1. are absent in Smicridea (Rhyacophylax) argentina. Width of eye, in dorsal view, almost half of the interocular distance. Anterolateral process of fifth ACKNOWLEDGEMENTS sternum as long as the segment. I warmly thank Dr. Elisa Angrisano (Facultad Genitalia. Antero-lateral margin of the ninth de Ciencias Exactas y Naturales, Universidad de segment
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